循环转轮空调系统变工况除湿特性

The relative humidity of air is generally above 80% in the ship cabin. However, the people will feel uncomfortable and the immunity will decrease when the relative humidity of air is higher than 70% in the environment. Effective air dehumidification will improve the air quality in the cabin and ensure the normal navigation of the ship. According to the characteristics of the relative humidity of air in the ship cabin and the waste heat generated by the operation of the equipment, the air can be dehumidified by the rotary desiccant wheel. And the waste heat of the ship can be recovered and used as the regenerative heat source of the rotary desiccant wheel which has the characteristics of large dehumidification, high control precision, economic and environmental protection. So it's promising to apply the rotary desiccant wheel dehumidification air conditioning system to the ship for recovering the waste heat of the ship and improving the air quality of the cabin, in this way low energy consumption and efficient dehumidification can be achieved. Therefore, a regenerative recirculating dehumidification air conditioning system was proposed in the present work. The dehumidification characteristics of the system under different working conditions were quantitatively studied, and the effects of different cycle bypass coefficient (45%-85%), process air temperature (28-40℃), the relative humidity of process air (50%-85%) and regeneration air temperature (130-160℃) on the dehumidification performance of the system were obtained. The experiment results showed that the rotary desiccant wheel dehumidification air conditioning system proposed could efficiently improve the dehumidification ratio compared the conventional sea water direct cooling. Under the same cycle bypass coefficient, the dehumidification ratio increased with the increase of process air temperature, relative humidity of process air and regeneration air temperature. There existed optimal dehumidification ratios of the system, and the corresponding optimal cycle bypass coefficient was 50%-75%. It decreased with the increase of the process air temperature and the relative humidity, and increased with the increase of the regeneration air temperature.